Second Signal
Second Signal, a service founded by Andrew Pollack, provided low-cost notification solutions for volunteer and call responder fire departments. However, as of June 17, 2025, the service was shut down following AT&T's decision to discontinue support for email to SMS messaging, leading to the termination of notifications for users on the AT&T network.
The decision to cease operations was attributed to the required transition to alternative notification methods, which would have significantly increased subscription costs, making it unaffordable for the service's intended user base. All subscribers who had pre-paid beyond June 1, 2025, were refunded for the unused portion of their services, marking the conclusion of Second Signal's operations.
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